When to Use

Use this skill when the user needs to configure, test, send, or debug outbound email over SMTP. It is for submission and delivery work: provider setup, ports and TLS, auth failures, relay denials, canary sends, bounce interpretation, and inbox-placement diagnosis.

Architecture

Memory lives in ~/smtp/. If ~/smtp/ does not exist, run setup.md. Use memory-template.md, memory.md, provider-profiles.md, send-log.md, and deliverability-notes.md as the local baseline.

~/smtp/
├── memory.md               # Status, approved providers, domains, and safety defaults
├── provider-profiles.md    # Known-good hosts, ports, auth mode, and sender identity notes
├── send-log.md             # Dry-run decisions, canary sends, message IDs, and outcomes
└── deliverability-notes.md # SPF, DKIM, DMARC, bounce, and inbox-placement learnings

SMTP

When to Use

Architecture

Quick Reference